CVE-2026-59846CWE-77CWE-78command-injection

CVE-2026-59846

Low · published July 21, 2026

CVSS v3.1
3.9
EPSS
0%
Percentile
1.7
In the wild
Unconfirmed
What it is

A flaw was found in libssh. A malicious username expanded through %r in ProxyCommand handling can inject shell metacharacters, exposing environment variables and causing unintended shell behavior.

The record
Technical detail
CVSS v3.1
3.9 · LOW
Vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N
CVSS v4.0
Not supplied
EPSS
0.00120 · 1.7th percentile
Weaknesses
CWE-77 · Improper Neutralization of Special Elements used in a Command ('Command Injection'); CWE-78 · Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
Published
2026-07-21T17:17Z
Affected products (5)
ProductVersionsFixed in
libssh/libsshall versions—
redhat/hardened_imagesall versions—
redhat/enterprise_linuxall versions—
redhat/enterprise_linuxall versions—
redhat/enterprise_linuxall versions—
References (6)
https://access.redhat.com/errata/RHSA-2026:42922 · [email protected]https://access.redhat.com/errata/RHSA-2026:55855 · [email protected]https://access.redhat.com/errata/RHSA-2026:62217 · [email protected]https://access.redhat.com/errata/RHSA-2026:62218 · [email protected]https://access.redhat.com/security/cve/CVE-2026-59846 · [email protected]https://bugzilla.redhat.com/show_bug.cgi?id=2498179 · [email protected]
EPSS history
Timeline
  • 21 JUL 12:55Z
    Libssh: libssh: information disclosure via proxycommand %r username expansion
    cvelistv5